youns

hi, i recently created a game that i would like to install over 905x3 tv box, i would like to protect it from copy. is there a way to encrypt the whole ROM without the need of any external hardware or password to be entered each reboot ? tv box launch directly into the game and every possible way to interact with linux is disabled (keyboard, usb, lan) and i only need to encrypt the ROM to make the game more resistent in some extent to copy. i read about encrypted bootloader but i'm not sure if that is what i need. can i only encrypt the game bin with a key that is protected inside the 905x3 ? (beside cpuid as it seem easy to reverse). i'm not super good at coding and i would like some help or a step by step guide.